Electrophoretic device, method for driving the same, and electronic apparatus
AssigneeSeiko Epson Corporation
InventorsHideyuki Kawai, Tatsuya Shimoda
Life of this patent
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Abstract
An electrophoretic device according to the present invention comprises electrophoretic dispersion including a liquid-phase dispersion medium and electrophoretic particles dispersed therein, in which the positions of the electrophoretic particles are controlled in accordance with an electric field applied thereto. In addition, the electrophoretic device further has a first means for applying a first voltage so that a first dispersion state of the electrophoretic particles is changed into a second dispersion state and a second means for applying a second voltage so that the second dispersion state is substantially sustained. The electrophoretic device described above has superior image-sustaining properties.
Claims14
A method for driving an electrophoretic device including an electrophoretic dispersion which contains a liquid-phase dispersion medium and electrophoretic particles dispersed therein, the positions of the electrophoretic particles being controlled in accordance with an electric field applied thereto, the method comprising:
- a first step of applying a first DC voltage to the electrophoretic particles so as to change a first dispersion state thereof into a second dispersion state;
- and
- a second step of switching from the first DC voltage to a second DC voltage and applying the second DC voltage to the electrophoretic particles so as to substantially sustain the second dispersion state,
- wherein the first DC voltage has a first polarity, the second DC voltage has a second polarity, and the first polarity is the same as the second polarity.
A method for driving an electrophoretic device including an electrophoretic dispersion which contains a liquid-phase dispersion medium and electrophoretic particles dispersed in the liquid-phase dispersion medium, the method comprising:
- applying a first voltage to the electrophoretic particles so as to change a first dispersion state of the electrophoretic particles into a second dispersion state of the electrophoretic particles;
- outputting a second voltage from a first capacitor;
- and
- applying the second voltage to the electrophoretic particles so as to substantially sustain the second dispersion state.
Dependencies are inferred from the claim text.